Side wall sampling tool



Jam, 8, i946. cz. J. MCWHORTER 2,392,383

SIDE WA'LL SAMPLING` TOOL.v

Filed June 28, 19215 A s sheis-sheet4 `1 INVENToRl @au .cw J. NCW/@frm .am 1946., c, J. McwHoRTl-:R A 2,392,533

SIDE WALL s AMPLING TOOL Filed Juneze, 1943 s sheets-sheet 2 I 46 41.9l y

'IN TOR svg-K MUN ATTORNE C. J. MCWHORTER SIDE WALL SAMPLING TOOL Jam.. @9 @94.6,

5 Sheets-Sheet 5 Filed June 2 8, 1943 llll Illini FIG. l'

l ATTO NEY VPatented Jan. v8, 1946 I' N-ITED STATES PATE-:Nr orricls.` I v snm walillililsme TooL l Cullen J. McWhorter, South Houston, Tex., as-

signor to Lane-Weils Company, Los Angeles, Calif., a corporation of Delaware Application June 2s, 1943, senor No.- 492,636

17 claims. (ci. 25o-1.4)

My invention relates to side wall sampling tools.

that is, to tools adapted to 'be lowered within a well bore for the purpose of obtaining samples of the formation confronting the we1lbore.

l Among the objects of my invention are:

First, to provide a side wall sampling tool which is capable of taking a large number of samples at selected points along the well bore;

Second, to provide a side wall sampler which' utilizes a plurality of core-receiving cups or tubes which are adapted to be fed, one at a time, into a core barrel and forced into the formation, and

thereafter ejected into a receptacle, whereupon l another core cup or tube is substituted in the l core barrel;

Third, to provide a side wall sampling tool which may be adapted for either drill pipe or wire line suspension;

Fourth. to provide .a side wall sampling tool which, when arranged for wire line suspension, may be electrically operated and suspended in conjunction-with an electrode of electrical logging equipment to facilitate location of the points at which it is desired to obtain samples;

Fifth', to provide a side wall sampling toolwhich is inherently so designed that it is not v likely to become stuck or jammed within the well bore;

Sixth, to provide a side wall sampling tool wherein the tubing-suspended type utilizes h5@- draulic pressure for its operation in such a man-` ner that normal circulation may be maintained through the sampling tube and drill pipe, aswell as a bit which maybe vprovided below the sampling tool, the sampling tube being operative 'only' when the predetermined circulation pressure is exceeded; and

Seventh, to which is extremely compact, considering the number of samples which may be obtained thereby. With the abovev and ether objects in view, as may appear hereinafter, reference is directed to the accompanying drawings, in which:

vFigure 1 is a fragmentary longitudinal sectional view of th'e upper portion of one form lof my side wall sampling tool;

Figure 2 is another fragmentary longitudinal sectional view continuing from Figure 1, with the core barrel shown in its retracted position;

Figure 3 is a fragmentary longitudinal sectional v iew of the same portion ofthe side wall sampling tool shown in Figure 2, but with the core barrel in a partially extended position;

Figure' 4 is an enlarged transverse sectional VView throughI-l ofFigure 1;

- tional view showing the iied side wall sampling tool;

Figures 5, 6, 7 and` 8 are enlarged transverse v dinal sectional view of the` core barrel substantially along the line 9.-9 of Figure 3;

Figures 10 through 15 illustrate a modiiiedform of my sid wall sampling tool designed for suspension from a wire line: A

Figure 10 is a fragmentary longitudinal secupper part of the modi- Figure 11 is a fragmentary longitudinal sec, tional view cntinuing. from Figure l0;

Figure 12 is an enlarged transverse sectional view through |2|2 of Figure 10;

Figures 13 and 14 are enlarged transverse secprovide a. side wall sampling tool l tively, of Figure 11; and

Figure 15 is a longitudinal sectional view through one ofthe core tubes, the corei plunger extension unit and thelower end of the' core plunger. Y

llteference is first ldirected to the structure shown in Figures l th'rough 9: A side wall sampling tool is attached to a tubing string (not shown) by an adaptor i. -The adaptor in turn is screw-threaded into the upper end of a cylinder 2 which is joined at its lower end to a sleeve 3. The sleeve 3is connected to a body member 4 which in turn is connected at its lower end to -an additional length of tubing string (not shown) Screw-threaded into the upper end of-:the upper header 5 of thenbody member 4 and extending upwardly through the sleeve 3 and into the cylinder lis a circulation tube 9.

Mounted withinthe cylinder 2 is a tubular stem Iiijwhich carries a piston il adapted to form a sealing iit with the side walls of the cylinder 2. v The piston Il is urged upwardly'by a re` turn spring I2 mounted in the annular space between the cylinder 2 and tubular stem lli, the lowerend of the return spring bearing against a shoulder-,formed constriction of the cylinder v2 at its lower end. The upper end or the circulation tube is provided with a sealing gland il 'which seals` against the internal wallsv of the tubular stem I0. v The upper end of the tubular stem lll is cloledby a plug 4. Below the plug I4 the side walls of the tubular stem I3 are provided with circulation ports I5 and between the circulation ports vand the plug are other openings IB. A control piston I1l is normally positioned between the openings I6 and the circulation ports I5. A stem I8 projects upwardlyfrom the control piston I1 through the plug |4. The upper protruding end o! the stem I8 is surrounded by a counterbalance spring I3 and a shock-absorbing spring 23. 'Ihe upper end of the stem I8 is provided with -a head A 2|, against which the counterbalance spring' bears so as to hold the control piston I1 in its upper position between ports I5 and the openings |3, as shown by solid lines in Figure 1. The shock-absorbing spring 20 does not extend to the head 2|. but is engaged by the head after the piston has moved downwardly to close or partially close the circulation ports I3. -The outer end of the stem i8, its head 2| and springs I3 asoaess ner catch 1ug 30. The catch lug 29is adapted to engage a channel 3| formed in the sleeve 3, while the lug is adapted to engage a notch 32 provided in the upper end of the ejector rod 26.

' The latch lever and its lugs are so proportioned that when the lug 29 is in the channel 3| the ejector rod is free to slide within the drive bar 21,.and when the lug 30 engages the notch 32 t-he ejector rod andedrive bar are locked with respect to each other, but are capable of sliding as a unit along the sleeve 3.

The lower end of the drive bar 21 is bifurcated to form a yoke 33 which journals the upper end of a. core barrel 34, as shown in Figure 7. The core barrel may be substantially rectangular in cross section, its radiallyouter side, however. being curvedv into conformity with the adjacentl wall of the body member 4, which wall forms a continuation of the inner wall of the sleeve 3. The abutting ends of the drive bar 21 and core barrel 34 are preferably semi-spherical in form and have a common center about the Vaxis of rotation o! the core barrel.

,The core barrel extends downwardly from the drive bar, its upper-'end being located in a guide opening 35 formed in the upper header I5 of the body member 4. The lower endl of the core barpassing through the circulation ports I 3 is increased to the point that a substantial pressure diilerential exists across these ports to overcome the preloaded force of the counterbalance spring 23, the. control piston |1.moves downwardly .to close the circulation ports il, whereupon the pressure of the duid above the ram piston' I acts to drive the ram piston |I downwardly against the preloaded i'orce ofthe return spring I2; Movement of the ram piston I and tubular stem I0 is utilized to operate the core barrel and coring tube or liner oi' my side wall sampling tool to be described hereinafter. l

The plug I4' is provided with a lateral slot which receivesa radially extending lever 23 pivoted on a pin 24. The inner end of thelever 23 is adapted to engage annular grooves 25-provided on the stem I8. while the outer end of the leyer is adapted to engage the lower end o! the adaptor I when the ram piston and tubular stem III are in their upper position, as shown by solid lines in Figure 1. In this position the stem Y x I l is free of the lever 23. A small'spring urges the lever into engagement with the grooves 2l when the radiallyouter end of the lever is irse;

'I'he function of the latching device thus described will be set forth in more detail hereinafter'.

Attached to or formed integrally with the lower end of the tubular stem I3 is a core cup ejector rod 23. The rod is located eccentrically along one side of the circulation tube 3. The ejector rel, when in its initial or vertical position, as shownin Figure 2, extends vertically downwardly into the chamber 1 o! the body member 4.

A pair ot links are jo aled on a link pin 31 located within the upper end of theclamber 1.'. 'Ihe axis of the linkpin is parallel to the axiscf the connection betwe/enthe yoke 33 and core barrel 34, but is displaced downwardly to a int about midway between the extremities of t e core barrel. The links extend laterally from the link pin 31 to the sides of the core barrel at its midportion and are journaledV thereon.` 'I'he upper portion of the ch'amber 1 opposite the core barrel 34 is provided which the core barrel adapted to swing, as shown in Figure 3. y

Movement of the core barrel is accomplished as follows: The core barrel initially occupies the position shown in-Figure 2, in which it extends coaxially from the drive bar 2'1.l During initial movement of the tubular stem l0 the ejector rod 23 moves downwardly within the drive bar 21 until the notch 32 receives the catch lug 30; thereupon the ejector rod and drive bar move downwardly simultaneously." Sumcient lclearance is provided between the latch vlever and channel or notch to enable the lower end of the tubular stem II! to bear directly against the drive.'bar`21 when the'catch lug 29 is in the notch 32. Downward movement of 'the drive bar causes the core barrel to swing out- 'wardly about the axis of the link pin l31. so that rod 23 is .slidable within the borel 21a of. a core barrel drive bar 21. The drive bar 21 i'its between the circulation tube land the sleeve 3. The radially outer sidel of the drive bar 21 is curved in conformity with the interior of the sleeve, 3.1 The radially inner side of the drive f ber is shaped to clear the cireulsucn tube t.

Secured to the upper end of the drive bar 21between the ejector rod 23 and tbe adiaeent wall'of the sleeve' 3'.' is a latch lever 28 which is directed upwardlyiand is provided at its upper end with a radially outer catch lug 23. and a. radially in the lower extremity o! the core barrel is .jabbed outwardly against the formation. l

The core barrel 34 has 'a circular bore 33 which receives a plurality of core barrel liner cups 43. Each liner cup consists of a thin tubular shell bevel d internally at its lower end and having an int al reinforcing flange at its upper eind.` The lower extremity of the core barrel is tapered and circular in cross section,terminating in uninternaily beveled core cutting tip 4 I.

The core barrel linercups are fed intoposition from a magazine 42 mounted in the lower portion of the sleeve'3. The magazine 42 is provided with a vertical slot 443 adapted to accommodate the provide space for the core barrel 34. the commuiwith a siot n,v through Y nication between the circulation passages 8 and the circulation tube 8 in the header 8 is ofrs'et' slightly and the clearance Abore 44 is correspondingly eccentric.

The magazine may comprise several magazine about two-thirds of the circumference of a circle,

one end of each channel intersecting the drive bar receiving slot 43.

' Coiled around the circulation tube 8 and sultably anchored in the magazine 42 are feeding springs 48 which have end fingers 41 which extend 2 into the core cup receiving channels 45. The corebarrel liner cups 40 are set adjacent each other,A open ends downward, in the magazine channels 48 and, as viewed in Figure 6, the springs 48 feed the core cups clockwise into the drive bar-receiv` ing slot 43.v The drive bar isprovided with a lateral slot 48 which registers with the magazine channels and communicates with the bore 21a,

thus the feeding springs 46 push thecore cup into the bore 21a in alignment with the core cup ejector rod 28.

Operation of my side wall sampling tool illustrated-in Figures 1 through 9 is as follows: Between operations fluid circulates downwardly through the adaptor I, circulation ports I8, tubular stem Ill, circulation tube 8, circulationv passages 8, and int'o the drill string below. In order to extract a core from the sidewall of the well bore, the pump pressure is increased to create sumclent pressure diflerentialvbetween the space above the ram piston II and theinterior of the tubular stem I0 to move the control piston I1 downwardly, closing circulation ports I8. When this is accomplished the ram piston II is driven downwardly, moving the tubular stem I0 and core cup ejector rod 28 downward until the latch lever engages the notch .32 and releases the core barrel drive bar 21. During this moyement the lowermost, core barrel liner cup 40 in the core barrel 34 is ejected into the bottom of the chamber 1 and a new core barrel is moved into position.

Upon release of the core barrel drive bar 21 it moves downwardly with the core cup ejector rod, causing the core barrel to move from the vertical position shown in Figure 2 to the inclined position shown in Figure 3, that is, the core barrel is jabbed laterally against the sidewall of the well bore. The tubing string is then lowered gradually.

y causing the core barrel to pivot about its point of connection with the links 88 and about its. point of contact with the formation, and force itself further into the formation.

The pump pressure -is relieved after the tubing member 4 may be provided with a deecting cam thereupon locks the control piston in its upper position. The tubing string'is then raised, releasing` the load on the outer end of the core barrel. whereupon thereturn spring I2 lifts the ram piston and the connected parts, returning the core barrel to its initial position, as shown in Figure 2. When `the parts reach their initial position the lever 28' releases the control piston I1 so that the cycle-may be repeated by again applying Pump pressure.

The\general arrangement of/the core barrel.' liner cups and magazine, and associated parts,A

may be adapted for operation from a wire line. Such an varrangement is illustrated in Figures -10 through 15, inclusive. In the structure shown'ln Figures l0 through l5, inc1usive, reference characters designating parts which are essentially the same as the above described structure are retained. 'Ihe structures may be identical with the exception that a rod 8l is' substituted for the circulation tube Sand the circulation passages 8 in the body member 4 are omitted.

However, other modications are illustrated which are interchangeably applicable to the tubing suspended structure. For example, the links 38 may be omitted and, instead, the side of the core barrel $4 adjacent the wall of the body 82. This is in the form of a hump located downwardly from the axis of rotation of the core bar. rel. The deiiecting cam engages a deilector 8l in the form of alug projecting inwardly through the contiguous wall of the body member 4,`the shape and position of the deflecting cam and its deector being such that when the core .barrel is driven downwardly its lower end is deflected outwardly. The cam and rider do not have to deflect the core barrel its full length o! movement for the reason that the side wall sampler operates lcore barrel in the liquid, upon being deflected even slightly, completes the outward movement of the core barrel into contact with the formation, vthat is, the side thrust-of the liquid against the angularly displaced core barrel, as the core bar- ,rel moves downwardly, is suicient to throw the lower end oi.' the core barrel outwardly against the formation.

Another modification is that the lever which interconnects the operation of the ejector rod and drive bar may be mounted between the ejector rod and the rod lor post 8i. Thus, a latch lever 84 is secured to the radially inner wall of the drive bar 21. The latch lever is provided with latch lugs 88 and 88 which engage-a channel 81 appropriately positioned in the post 8I and a notch 88 in the corresponding side of the ejector rod A28. The upper end of the rod or post 8l may be restrained against lateral displacement with respect to the drive bar 21 by a band 89 iltted therearound and secured to or-Iorming a part o f the upper end of the drive bar 21.'

string is mwered, but the act or lowering the tubing string causes the inner end of the core barrel to pull downwardly on the core barrel-drive bar, thereby pulling downwardly on the elector rod and tubular stem-I8 until the control piston I1 is brought into contact with the upper end of the circulation tube 8. that 1S. against the sealing maelectrlc motor 82 and a gear reduction unit 8l. gland I3, as shown by dotted lines in Figure 1.

The proportions of the various parts are so arranged that when the core barrel has obtained its sample the control piston I1 has been moved up- Also, in the modified structure, a shell 8l substituted lojr the sleeve 3 and extends upwardly beyond the core cup elector rod to encase the operating mechanism to be described hereinafter. The upper end of the shell 88 screws into 'a housing 8i sultablyconnected to a conductor cable (not shown). Within the housing 8l is an The gear reduction unit drives a jack screw 84 ,which extends downwardly through a packing wardly to vits initial position, and the lever 28 75 88 in the form of a split nut comprising two or under liquid and the downward movement o! the tuating spring 69.-

three segments which tend to'separate and clear the jack screw by the action of springs 68 shown in Figure l2.

Surrounding the traveler 66 and extending downwardly therefrom is a cage 61, the lower end of which is connected with the upper end of the core ejector rod 26 by means of an adaptor Iltting 61o. Between the cage 61 andshell 60 is iltted a latching liner 68 which extends from the upper end of the shell 6E downwardly to a point near butabove the core cup ejector rod 26 when the rod is in its upper position, as shown in Figure 1U. At least the lower portion of the latching liner 88 is spaced from the shell 60 to form an annular cavity adapted to receive a main or actuating spring 89. The actuating spring bears downwardly upon the adapterltting 61a.

The traveler 65 is operatively connected with the cage B1 by means of latching arms 10 which are attached at their lower ends to the cage 61 and extend upwardly to points opposite the traveler B5. Each latching arm lil is provided with radially outer lugs 1i and radially inner lugs 12 adapted, respectively, to engage an annular channel 13 in the latching liner 68 or recesses 14 formed in the segments comprising the traveler 65. Slots Iii are provided in the cage 61 to accommodate the lugs 12 of the latching arms 1i). The traveler @i is urged downwardly between the latching arms by means of a traveler spring 16 positioned between the upper end of the traveler 85 and the upper end of the cage 61.

The latching arms 10 are provided with internal shoulders 11 which extend under the traveler Bil.` These shoulders are adapted, when the latching arms and traveler are in their lower position (indicated by dotted lines in Figure l0) to rest upon a retraction head 1B secured to the lower end of the jack screw GG.

Operation of the actuating mechanism for the side wall vsampler shown in Figures 10 through 15 is as follows: Initially the parts are in the dotted line position shown in Figure l0. The latching arms ltlare in their radially outer position with the shoulders 'l1 resting on the retraction head 1s and tneexpanded trave1er es, which is free of the Jack screw 6d, has dropped to its lower position. It will be ,noted that the shoulders 11 have steps which limit inward movement of the latching arms, and that the upperface of the retraction head 18 has a helically shaped cam portion. Thus, when the jack screw 64 is rotated thelatching arms 1U and traveler 65 are into the channel 13 so that the load of the spring 89 is no longer directly supported by the traveler $5. The spring is not released, however, for that portion of the traveler 65 below its recesses 1li is of such diameter as to restrain the latching arms from moving radially inwardly from the channel 13. Continued upward movement of the traveler 65 until its lower end clears the latching arms 16 is required to release the actuating spring 69.

This is vdesirable for it is possible by noting the reading on an ammeter, or similar instrument associated with the electric motor 62, to determine when the motor has been relieved of its load and thus permit the motor to be turned oil after the spring has been compressed, but before it has been released, so that the parts are in position for operation, but need not be operated until desired. 1 As soon as the latching arms 10 are released, the spring 69 drives the core cup ejector rod 26, and later the core barrel drive bar 21, along with the core barrel, downwardly and, as previously described, the core barrel is caused to swing outwardly into contact with the formation. The weight of the entire tool, as well as the energy stored in the spring in excess of'that necessary to move the core barrel into contact with the formation, is employed to drive the tip of the core barrel into the formation and thereby obtain a sample.

As in the first described structure, the previous core barrel liner cup is ejected into the chamber 1 -just prior to4 outward movement of thecore barrel.

In order to permit the use of a series of magazine units such as shown in both constructions, it is desirable to have one or more dummy core liner -cups Bi, as shown in Figures 14 and 15. These are preferably located in the upper magazine unit, that is, the upper core receiving channel 45, and consist of tubes 82 which are fitted with spring clips 83. The lower end of, the core cup ejector rod 26 is provided with an internal ange 84 which, when the core rod is directed downwardly over the spring clip 83, interlocks therewith as shown .in Figure 15.

In operation, the core barrel liner cups lil of the uppermost magazine channel [t5 are removed first, the last one being a dummy core cup ill, and when it becomes attached to the ejector rod 26 it, in eiect, functions as an extension thereof to eject the liner cups of the lower magazine channel. If three magazine units are provided, then the last member of the upper two magazine channels are dummy core cups 8|, the operation being essentially the same as in the case of two such magazine channels. 'Ihus, a large number of the number of magazine units.

Continued rotation of the yjack screw causes f the threads of the travelervand jack screw to mesh and i1' the latching arms havenot previously. aligned 'with therecesses 14 the traveler 65, turns relative to the latching arms until the lugs 12 engage the recesses 14. When this condition obtains,k continuedi'otation vof the jack screw raises the traveler and cage 61, as well as' the adaptoriitting 61a, thereby compressing the ac- As the' traveler reaches its upper position, the

tubular drive bar hinged to said core barrel;`

means operatively associated with the core barrel and drive bar tending, when the drive bar is re,` ciprocated, to move said core barrel between a position in alignment with the drive bar and an angularly disposed position with respect to the drive bar, 4wherein the core barrel protrudes laterally from the body structure; a plurality of core barrel liner cups adapted to move through said `tubular drive b ar and core barrel; means for feeding said core cups` into said drive bar; and

advancing and ejecting means operable prior to reciprocation ofsai'd drive bar to eject a core cup from said core barrel and move a succeeding core cup into position at the extended end thereof.

2. An oil well tool comprising: a body structure defining a core cup receiving chamber; a tubular core cups in succession from saidl magazine structure into said core barrel; and advancing and ejecting means for said core cups for moving said core cups in succession through said core barrel` and ejecting the same into said receiving chamber.

3. An oilwell tool comprising: a/body Astructure defining a core cup receiving chamber; .a tubular `core barrel mounted in said body structure and movable between a vertical position directed into said receiving chamber and a lateral position protrud-ing from said chamber, there being a slot in the wall of said chamber to accommodatesaid core'barrel; a tubular drive bar hinged to said core barrel; means operatively associated with said core barrel and drive bar tending, when the drive bar is reciprocated, to move said core barrel ybetween said positions; a plurality of core barrel liner cups adapted to move through said tubular drive bar and core barrel; a magazine structure for feeding said core -cups into said drive bar; 'and means operative prior to reciproeation of said drive bar for moving said core cups in succession along the bores of' said drive bariand'core barrel and ejecting the same in succession intosaid receiving chamber. K

4.` An oilwell tool comprising; a vertically reciprocable'tubular core barrel and drive bar; a tubular core barrel hinged to the lower end of the drive bar and movable between a vertical position in alignment with the bore of the drive 'bar and a lateral position engageable with'a surrounding well bore wall; a body structure for guiding and supporting said drive bar and core barrel and defining a core cup receiving' cham- `ber communicating with the bore of said core barrel when said core barrel is.in its vertical position; a plurality of core cups adapted to pass through the bore of said drive bar land core barrel; a magazine structure for said core cups adapted to deliver the core cups to said drive bar, there being a lateral opening in the drive and ejecting device adapted to reciprocate in the bore of said drive bar'for moving the-'core cups into said core barrel and ejecting the same therefrom into said receiving chamber.

5. An oil well tool comprising: a body structure .defining a vcore cup receiving chamber and an eccentrically located longitudinally extending guide slotabove said chamber; a tubular core barrel drive b'ar slidable vertically in said slot; a'. tubular core barrel hinged to thelower end of said drive bar andextending into said chamber; means for moving said core barrel between a vertical position in alignmentl with said `driv'ebar and a laterally directed angular position wherein said core barrel protrudeskfrom said body struc- Y ture, there being a slot in the side wall of-said chamber to accommodate said core barrel; a Flu- .bar to receive said core cups; and a core feeding A o until said rod 70 ment along saiddrive cups in a circle, the tangent of which intersects the bore of said drive bar, said drive barhaving a lateral slot to receive said core cups, and means for urging said core cups from said magazine into said bore through said slot; and a feedingand ejector rod adapted to reciprocate-in said drive bar bore for urging said core Icups into said core barrel and eiecting the same therefrominto said receiving chamber.

6. An oil well tool comprising: a tubular drive member having a longitudinal bore therein and a side vopening communicating with said bore;- a core cup advancing bar adapted to reciprocate in said drive member; means for moving said bar. into said drive member' a predetermined distance andthereupon-moving said-advancing bar and drive member in unison; a plurality of core go'cups; means for feeding said core cups later-- ally through said sideA opening into said drive member; a core barrel hinged to s aid drive member and having a bore communicating with the bore of said drive member to receive said core cups; and means operative to swing the core barrel between a coaxial position with respect to the drive member and a-laterally directed angular relation therewith during unified 4movement of said advancing rod and drive member. l

7. An oil well tool compri ngz a tubular drive member.' having a longitudinal bore therein and a side opening .communicating with said bore;

a core cup advancing bar adapted to reciprocate in said drivemember; means for moving said bar 5 into said drive member a predetermined distance and thereupon moving said drive bar and drive K 'member in unison; a plurality Lof core' cups; means for feeding \said core cups laterally Z through said side opening intol said drivemem- 4o ber; a core barrel hinged to said drivemember and having a bore corinnunicating with the bore of said drive member to receive saidcore fcups; means operative to swing the core barrel between a coaxial position with respect to the drive member and a laterally directed angular relation therewith during unified movement of said advancing rod and drive member; and a. receptacle for core'cups positioned below said core barrel, said advancing rodadapted during its movement into said drivemember to move one core cup-to the'extremity of the' core barrel and 'to eject the preceding core cup into said receptacle.

8. An oil well tool comprising: ture: a tubular drive member 'disposed eccen- 55 trically'in saidbody structure and having a-longitudinal bore and a side lopening communicating therewith; Aa core cup advancing' and ejecting rod adapted to reciprocate in saidid'rive meniber; means for restraining said drive member enters a predetermined distance and thereupon interlocks with said rod andreleases said drive memberj whereby said rod-and drive member move in unison; a plurality of dore cupsr a magazine for said core cups within said body structure and having a circularchannel adapted to receive said core. cups and direct the sameinto said driveA member through said side opening, iclud'ingmeans for yieldablyv urging the core cups therein in position for advancemember by said rod; a core barrel within said body structure hinged to said drive member and having'a bore adapted to receive said core cups therefrom; and means operable in conjunction vwith reciprocation of 75 said drive member for moving said core barrel.

rality of core cups; a magazine therefor mounted within said body'structure for arranging the core a bodystruc- E aseaoss thereupon interlocks with said rod and releases said drive member, whereby said rod and drive member move in unison; a plurality of core cups;

until said rod enters a predetermined distance and thereupon interlocks with said rod and releases said drive member, whereby said rod and drive member move in unison; aplurality of core cups; a magazine for said core cups within said body structure and having a. circular channel adapted to receive said core cups and direct the same into said drive member through saidA side opening, including means for yieldably urging the core cups therein in position for advancement along said drive member by said rod; a core barrel within said body structure hinged to said drive member and having a bore adapted to receive said core cups therefrom; means operable in conjunction with reciprocation of said drive `member for moving said core barrel between a tcoaxiauy related position and an sngulsrly related position with respectto said drive member, whereby in the latter position said core barrel protrudes laterally from said body member; said body structure defining below said core barrel a core cup receptacle having a lateral opening for passage of the core barrel, said rod adapted during its movement into said drive member to move one core cup to the extremity oi said core barrel and eject the preceding core cup therefrom into said receptacle. f u

10.*An oil well tool adapted to be suspended vfrom a tubing string and comprising: a body lstructure connected with said tubing string; a tubular core barrel mounted therein: a tubular drive b ar hinged to said core barrel; means operatively associated with thev core barrel and drive bar tending, when the drive bar is reciprocated, to move said core barrel between a position in alignment with the drive bar and an angularly disposed position with respect to the drive bar wherein the core barrel protrudes laterally from the body structure; a plurality of core barrel liner cups adapted to move through said tubular drive bar and core barrel; means for feeding said core cups into said drive bar; advancing and ejectlng means operable prior to reciprocation of said drive bar to eject a core cup from said a magazine' for said core cups within said body structure and having a circular channel adapted to receive said core cups and direct the same into said drive member through said side. opening, including means for yieldably urging A'che core cups therein inposition for advancement along said drive member by said rod; a core barrel within said body structure hinged to said drive member and having a bore adapted to receive said core cups therefrom; means operable in conjunction with reciprocation of said drive member for moving said core barrel between a coaxially related position and an angularly related position with respect to said drive member, whereby in the latter position said core barrel protrudes laterally from said body member; Va hydraulic ram operatively connected with said advancing and -ejecting rod and drive member; means', defining a by-passpassage through said body structure from the-tubing string; and pressure responsive means for closing said by-pass passage and directing the pressure of uid in`sald tubing string against said ram.

l2. An oil well tool adapted to be suspended from a conductor cable, comprising: a body structure suspended from said conductor cable; a tubular core barrel mounted in the lower portion of said body structure; a tubular drive bar hinged to said core barrel; means operatively associated with the core barrel and drive bar tending, when fthe drive bar is reciprocated. to move said core barrel between a positionyin alignment with the drive bar and an angulariy disposed position with respect to the drive bar, wherein the core barrel protrudes laterally from the body core barrel and move asucceeding core cup into position at the extended end thereof; a hydraulically actuated ram operatively connected with said drive bar and advancing and ejecting means; means deiining a by-pass passage through said body structure from the tubing string; and pressure responsive means for closing said. by-pass passage and directing vthe pressure of tubing string against said ram.

'11. An oil well tool adapted to be suspended u troma tubing string and comprising; a, body structure connected withsaid vtubing string; a tubular drive member disposed eccentrically in said body structure land having a longitudinal bore and a sideI opening communicating therewith'a core cup advancing andfejecting rod adapted to-reciproca/te -in said drive member; means -for restraining said drive member until e said rod enters a predetermined distance and duid in seid structure; a-plu'rality of core barrel hner cups adapted to move through said tubular drive bar and core barrel; means ior feeding said core cups into said drive bar; advancing and "electing means operable prior to'reciprocation of said drive bar to eject a core cup from said core barrel and move a succeeding core cup into position at the ei:- tended end thereof and an operating apparatus for said drive bar and advancing and ejecting means, including an electric motor, a jack screw driven thereby, a traveler adapted'to movealong said jack screw, a springV connected with said traveler and adapted to be stressed by movement of said traveler on said lack screw, means for releasing said spring and means operatively connecting 'said spring with said advancing and electing means and with said drive bar.

13. An oil well ltool adapted to be suspended from a conductor cable. comprising: a body structure suspended from said conductor cable; a tubular drive member disposed eccentrically in said body structure and having a longitudinal bore and aside opening communicating therewith; a core cup advancing and ejecting rod adapted, to reciprocate in said drive member: means `ior restraining said drive member until said rod enters a predetermined distance and thereupon interlocks with said rod and releases said drive member. whereby said rod and drive member move in unison; aplurality of core cups: a magazine jfor said core cups within said body structure and having a circular channel adapted to receive said core cups and direct the same into said drive member through said side opening, including means for yieldably urging the rei within said body strucmre hinged .to said drive member and having a, bor'e adapted to receive said core cups therefrom; means operable in conjunction with reciprocation of said drive member for moving said core barrel between a coaxially related position and an angularly related position with respect to said drive member, where-v by in the latter position .said core barrel pro- 'trudes laterally from said body member; an operating apparatus for said drive member and electing rod, including an electric motor driven means connectedwithsaid drive member and electing rod for moving them in one direction and simultaneously stressing a spring, and means for releasing said spring, thereby to eiect movement of said ejecting rod and drive member in the opposite direction.

14. An oil well, tool comprising a body strucfture, a tubular core barrel `mounted therein.

means for moving -said core barrel between a position within said body structure at which the axis of said core barrel is longitudinally directed and a protruding position in which the axis is\` laterally directed with respect to saidbody structure, a plurality of core barrel liner cups, a magazine for carrying said-cups,' and means for feeding said cups from said magazine in succession through said core barrel.

15. An oil well tool comprising Va body structure, a tubular barrel mounted therein, means for moving said barrel between a position withinsaid body structure at which the axisof said barrel is longitudinally directed anda position in which the axis is laterally directed'withrespect to' the axis of said body structure, a plurality of tubular elements, a magazine for carrying said elements in said body. structure, and means for feeding said elements from said magazine in succession into said barrel.

' 16. An oil well tool comprising a. body struc- 40 ture. stumm barrer associated with-said body structure, means for moving said tubular barrel between a longitudinally directed and a laterally directed protruding position with respect to the axis of said body structure, a magazine associated with said body structure for containing a plurality ofl tubular liner cups adapted to iit into and pass through said tubular barrel, means operative when said barrel is in the longitudinally directed position for feeding said liner cups from said magazine and injecting them in succession into said tubular barrel; and means for retaining said core cups against axial force while said tubularbarrel is moving into the laterally directed position.

17. An oil well tool comprising a body structure, a tubular core barrel mounted therein, a

tubular drive bar slidably mounted in said body structure and hinged to said core barrel, means to impart reciprocating motion to .said drive bar, means operatively associated with said core barrel and drive bar tending when the drive bar is reciprocated to move said core barrel betweena position in axial alignment with the drive bar and an angularly disposed position with respect to the drive bar wherein the core barrel protrudes laterally from the body structure, .a magazine associated with said body structure and adapted to contain a plurality of core barrel liner'cups adapted to move through said' tubular drive bar and core barrel, means for feeding said core cups from said magazine into said drive bar and advancing and electing means operable prior to reciprocation of saidI drive bar and while said barrel is in said axial alignment with said drive bar to eject a core cup from said core barrel and move a succeeding core 'cup into positionl at the extended end thereof.

CULLEN J. MCWHORTER. 

